Wrench.



No. 739,068 V PATENTED SEPT. 15, 1903.

" H.E.ERGANBRAGK.

WRENCH.

APPLIOATION FILED MAY 4. 1903.

no MODEL.

To all whom it may concern:

".nTo. 739,068.

Patented September 15, 1903.

PATENT OFFICE.

IIA'I. E. ERCANBRAOK, OF ELGIN, ILLINOIS.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 739, dated September1903- Applieation filed May 4;, 1903. Serial No. 155,463. (Ii-'0 model.)I

Be it known that I, HAL E. EROANBRACK, a citizen of the United States,and a resident of Elgin, in the county of Kane and State of Illinois,have invented a new and useful Improveinentin Wrenches, of which thefollowing is a specification.

My invention relates to an improvement in wrenches, and is particularlydirected to wrenches comprising a fixed jaw and a movable jaw, withmeans for clamping the jaws in any desired adjustment with respect toeach other.

The object of my invention is to provide certain improvements in theconstruction, form, and arrangement of the several parts whereby a verysimple and strong wrench is obtained in which the movable jaw may berapidly adjusted the required distance away from the stationary jaw andthere rigidly locked.

A practical embodiment of my invention is represented in theaccompanying drawings, in which 1 Figure 1 represents the wrench in sideelevation, a portion of the shank of the movable jaw being broken awayto clearly show the spring for frictionally holding the locking-wedge inits advanced or locking position. Fig. 2 is a rear elevation of thewrench. Fig. 3 is a similar view with the shank of the movable jaw andthe wedge shown in section, the parts being shown in their releasedposition. Fig. 4 is a similar View with the parts shown in their lockingposition, and Fig. 5 is a view "in perspective of the locking-wedge.

The fixed or stationary jaw of the wrench is denoted by 1, and it isprovided with the usual straight shank 2.

Two handpieces 3 and 4 are secured to the front and back faces of theouter portion of the shank 2 of the fixed jaw to form a suitable handlefor the wrench.

The back face of the shank 2 of the fixed jaw is provided with a toothedrack 5, extending from the jaw to the handle.

The movable jaw is denoted by 6, and it is provided with a hollow shank7, having a sliding engagement with the shank 2 of the fixed jaw; 1

The inner wall of the shank 7 opposite the rack 5 is provided with arack 8, extending gagement with each other when slid in one directionand permits the racks to be disengaged from each other when slid in thereverse direction, which wedge-block is constructed and coacts with theshank of the movable jaw as follows: The front of the shank 7 isprovided with an opening 10 therethrough communicating with the frontface of the shank 2 of the stationary jaw. A recess 11 leads from theinner end of the opening 10 a short distance along the inner face of thefront wall of the shank 7. A recess 12 leads outwardly from the outerend of the opening 10 along theinner face of the front Wall of the saidshank 7. This recess 12 starts at the opening 10 of substantially thesame depth as the recess 11 and then abruptly deepens to coact with oneof the wedges on the locking wedge-block 9. The

locking wedge-block 9 is provided with a wedge 14 and the body of thewedge-block,

which thin portion is located in the narrow portion of the recess 12when the wedge-block is in its released position. To look the shank 7 ofthe movable jaw to the shank 2 of the fixed jaw, the wedge-block 9 isslid forward, thus forcing the wedge 13 into the recess 11 and the wedge14 into the narrow part of the recess 12. When the Wedge-block is inthis position, the racks 8 and 5 will be interlocked. To frictionallyhold the wedge-block in its locking position, I provide a spring 17,which is located in a recess 18 in the inner side wall of the shank 7opposite one side of the wedgeblock 9. This spring 17 should be solocated that it will not interfere with the shank 2 of the stationaryjaw whenthe jaws are unlocked. The outer face of the wedge-block toothedracks, a wedge-block fitted to slide between the adjacent faces of theshanks on the other side thereof for bringing the racks into lockingengagement and a spring engaging the side of the wedge-block forfrictionally holding it in its locking position.

2. A wrench comprising a fixed jaw and its shank, a movable jaw and itsshank embracing the fixed-jaw shank, the adjacent walls of the shanks onone side thereof having toothed racks and a wedge-block having twowedges arranged to be brought between the adjacent faces of the shankson the other side from the racks for bringing the racks into lockingengagement.

3. A Wrench comprising a fixed jaw and its shank, a movable jaw and itsshank embracing the fixed-jaw shank, the adjacent walls of the shanks onone side thereof having toothed racks, the movable-jaw shank on theother side thereof having an opening and recesses leading from the innerand outer ends of the opening and a wedge-bl0ck located in the openinghaving wedges arranged to enter said. recesses for bringing the racksinto looking engagement.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 29th day of April,

HAL E. EROANBRACK. Witnesses:

F. C. KAUFFMANN, II. V. ALLEN.

